25719663859 has 2 divisors, whose sum is σ = 25719663860. Its totient is φ = 25719663858.

The previous prime is 25719663839. The next prime is 25719663863. The reversal of 25719663859 is 95836691752.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25719663859 - 2²³ = 25711275251 is a prime.

It is a super-2 number, since 2×25719663859² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25719663797 and 25719663806.

It is not a weakly prime, because it can be changed into another prime (25719663839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12859831929 + 12859831930.

It is an arithmetic number, because the mean of its divisors is an integer number (12859831930).

Almost surely, 2^25719663859 is an apocalyptic number.

25719663859 is a deficient number, since it is larger than the sum of its proper divisors (1).

25719663859 is an equidigital number, since it uses as much as digits as its factorization.

25719663859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24494400, while the sum is 61.

The spelling of 25719663859 in words is "twenty-five billion, seven hundred nineteen million, six hundred sixty-three thousand, eight hundred fifty-nine".